code 128 generator vb.net 1: Sun Certification for the Enterprise Architect in Java

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1: Sun Certification for the Enterprise Architect
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un s most advanced certification program in Java technology is the Sun Certified Enterprise Architect (SCEA) for Java 2 Platform. This book provides information that you will need to prepare for the SCEA exam. To pass the certification exam, you should be familiar with the fundamentals of applications programming and should have some proficiency in Java programming. Additionally, you should know specific enterprise technologies. All of these topics are covered in the book s chapters and on the CD accompanying the book:
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n Basic principles of enterprise architectures n Object-oriented design using (UML) n Two-tier, three-tier, and n-tier common architectures n Legacy connectivity n EJB and container models n Protocols (HTTP, HTTPS, IIOP, JRMP) n Applicability of JEE n Design patterns n Messaging n Internationalization n Security n Enterprise architecture case study (using UML)
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Eleven-plus years into its life, Java is now the mature technology most commonly used behind the strategic scenes for an enterprise. After years in which Java development seemed to be reserved primarily for Internet applications, larger firms in the corporate world are using Java as the language of choice over C and COBOL for most of their new development, including but not limited to messaging, back-end night cycle functions such as database repair and warehousing, and data capture from external data feeds. Java s appeal lies not only in its affinity for network and distributed computing (although Intranet, Extranet, and Internet applications remain the major focus of Java development) but also in Java s other qualities, such as ease of programming and cross-platform capabilities the write once, run anywhere promise.
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A large portion of the appeal of Java is the ease with which it allows the creation of web-based, self-service applications that enable customers to do their work and perform other tasks over the Internet through a browser. Most applications are HTML on the web server front end with Java servlets on the application server back end that run on the company s web server. Figure 1-1 shows the application server hierarchy. Java isn t just for e-business. Many organizations with large user bases are reengineering their client/server configurations because the deployment and distribution of this design is cumbersome and expensive. Some are developing Java applications for internal use, occasionally deploying Java clients to employee desktops. Still, many issues stand in the way of Java Enterprise Edition (JEE) adoption by corporate application development groups. These include concerns about the development environment, the need to locate or train Java developers, the complexity of Enterprise JavaBeans (EJB), and the need to upgrade to the new generation of JEE application servers to take full advantage of the technology. This is where the JEE architect is most needed. The right architect can step into the enterprise to resolve these issues and make the dream of a JEE-based enterprise a reality.
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FIGURE 1-1
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The Java Enterprise Edition (JEE) application server is the focal point.
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Engage
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Portal eCRM Content management EAI J2EE application server B2B integration Self-service applications Content management
1: Sun Certification for the Enterprise Architect
An undercurrent of concern also exists about what Microsoft is doing with its .NET initiative and what impact, if any, those actions will have on a development group s Java plans. Judging from the JEE application server market, however, Java and JEE are here to stay. At the time of this writing, research leaders project the application server market that was $2 billion in 2005 will reach $6.6 billion by 2012 (see www.researchandmarkets.com).
Java Is the Glue That Binds the Application Development Process
JEE application servers are critical to developing and deploying scalable enterprise Java applications. Application servers provide the infrastructure to execute and maintain business-critical applications, especially e-business applications. JEE defines the programming model and provides underlying services such as security, transaction management, and messaging to enable developers to build networked Java applications quickly and deploy them effectively in the distributed world. Figure 1-2 shows the multiple functions of the JEE application server.
FIGURE 1-2
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